Crossword Genius

Set off with it (8,2)

Ross

I believe the answer is:

switched on

I'm a little stuck... Click here to teach me more about this clue!

But I can't explain it at all! Could you help me understand?

(Other definitions for switched on that I've seen before include "with electricity supply?" , "Illuminated" , "Now listening to Radio 4, say" , "Emotionally aroused" , "Up to date" .)

I've seen this clue in The Everyman puzzle in The Observer.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.